Fun addition to block sets
347277
I got these for my friend's almost 2 year old daughter who loves building with blocks and cars.  We also enjoyed playing with them.
3482067
We got these as a gift for my toddler at Christmas, and I am glad there were several adults present when it came time to assemble all 48 pieces.  It took three adults about 15-20 minutes (give or take) to assemble all the blocks, which were a pain -- and the directions were more of a hindrance than a help for assembly.  Also, the arches are not well designed and I can foresee them being crushed (unlike all the other blocks, the arch does not have cardboard on all sides - the underside of the arch is "open").  I ended up taping the bottom flaps of the arch with packing tape, as they would not stand flat and kept tipping over.

That being said - we did assemble the blocks to about three feet high with an arch doorway and as long as you used basic building principles (overlapping bricks, etc) - it was pretty sturdy.  Well, it could be played with, but easily knocked over by an enthusiastic toddler who likes to make towers "go boom" for fun.

Another nice feature is that each side of a block has different designs on it. So you can create endless varieties of towers, castles, etc.  While I would've been ok with "boring" solid color blocks, having the ability to change up the appearance of your fortress is pretty nifty. All in all, this will be great for imaginative play

One final caveat? -- storage.  I haven't yet determined where to store these -- right now they are stacked in a 2.5'x2.5'x4' box that another present came in... I'm sure I could consolidate a little if I took pains to accurately stack each block ...but honestly I don't see my toddler doing that when it comes time to clean up, so expect to store them in a BIG box... or I guess resign yourself to having them scattered everywhere.

To summarize - I rated 4 stars because I love cardboard blocks, these are GREAT for creative play... but there are some cons.
3893810
These are a perfect fit with our lego and lego friends sets.  colors are very fun and the transparent ones have lead to extra creativity (adding drawing under them to give the effect of underwater life for example).  my girls are 4 & 6 and have not figured out how to play with them stacked yet, but Im sure they will soon, and I'm please these are not just limited to being bases.
3996764
My 2 yr old grandson& 4 yr old granddaughter have fun with these building blocks. They are easy to connect & are so cute. Toys like this gets their imagination a jump start.
4221800
I've done a few Nanoblocks sets and I really enjoyed this one! The different colours and small details (like the trees) make it a lot of fun to put together, and it looks really sweet when it's finished. I wish it was a little bit bigger - it's about half as tall as the Eiffel Tower and 3/4 as tall as Big Ben - but it's a very cute set.
1619088
I bought a couple of these sets for my friend's children. They seem to like them and have made some interesting contraptions. These K'nex sets are pretty easy to put together with single connectors...each piece connects to others with one snap. These are different from Legos actually appearing more realistic. One draw back is the pieces are more fragile (breakable) and may need adult help with younger children.

Overall, I (er, the kids) find these to be fun and even educational...A newfangled idea for youngsters.
2894800
These are certainly a fun twist to typical building blocks, colorful and sturdy, so many different things to do and build.  Hours of fun for my daughter and I!
461490
These sets are really cool. I've gotten used to the slightly odd instructions scheme over a few sets, and the results are pretty spectacular.
This set is solidly built and fun to play with.  Please keep in mind that there are NO hero characters in this set, only zombies.
4900527
This is a fun set with lots of "playability" for young children, particularly those who like building and cars. It runs on creativity and is open-ended, so that earns major points with me. The specified age range is 1-5, and indeed my 1 and 5 year old have both had a lot of fun playing with this set together. However, if I were buying it as a gift I'd target it no older than about 3, so they'll have some time before it starts seeming a little too young and they want to move on to a smaller scale of block.

The ramps are adaptable and easy to build with, although many children in the age range will need help to build a connected ramp system. I like that there are included instructions to build what's pictured on the box - though really I built it once to give the boys an idea, and they'll do their own thing from here on out.

If you're not very familiar with Mega Bloks, they come in a few sizes. These First Builders are the largest, and are bigger than Duplos and Legos - perfect for a younger age group. This set contains plenty to play with on its own, but is also a great addition to the other basic set of First Builder blocks we have.

There are included stickers to decorate a few of the blocks to look like grass, a fire hydrant, hospital window, etc. and are great accent pieces for the rescue theme. An adult will probably want to place these carefully on select blocks, and then of course the child places those blocks as they wish in the building process.

The only thing that I'd improve upon is including a storage container - the box really doesn't work well to fit everything back into once opened - but of course it's not too hard to find something to store blocks in. Overall it's a great set.
30401
Love these blocks! A fun take on Jenga. My only complaint is that one of the pieces is smaller than the rest. Makes the game a little unfair.
372956
We are VERY pleased with this set. It contains a large number of pieces in a variety of shapes - squares, windows, two large squares, three different types of triangle, and two sets of wheels - that allow you to build just about anything imaginable. Highly addictive for adults and children alike! My children, aged 2 and 4, have spent many hours playing with these in the two weeks that we've had them. The magnets are just as strong as other more expensive sets that I have used. They came in a rather cheap box that is not easy for the children to repack. I have figured out how to get all the pieces back in, but might end up throwing them in a larger box or basket for ease of cleanup. So far, the wheels have provided less interest than I expected. I think that's because the finished product breaks easily when it is played with or moved around. I highly recommend this set because it includes enough pieces to build large and interesting structures, without breaking the bank.
1700225
My little guy loves these blocks.  He's only 10 months old, so he doesn't really "get" the whole shape goes through the matching hole thing, yet, but he spends lots of time dumping them out of the bucket and putting them in again.  This set has been a great value when you consider the price vs number of hours he has actually played with a toy.

The blocks themselves are very sturdy plastic and have taken a beating with no noticeable wear.  The sticker on the side of the bucket has a small wrinkle in it, but it is really of no consequence.
4035634
Fun set with easy to follow instructions. Awesome price too!
4098292
Great quality pattern blocks. We bought these to go along with Saxon Math K. So far by 4 1/2 year old and 2 1/2 year old enjoy making designs with the pieces. The pieces are high quality plastic. There is a nice variety of shapes and sizes.
848295
This is a great set.  Having two vehicles and two figures + dog makes for many opportunities for creative play.  And helpful for a canned set is the fact that there are lots of blocks, including some shapes and colors we did not have so my son has combined this set with others in building things.
2886133
My kids (4 and 2) love the bristle block system. I added this to my existing set and they work great together. It is easy for them to attach and detach the blocks, and the shapes are more interesting that traditional Duplo large  building bricks. This set came with people and a dog, altho weirdly the people have detachable hats which were a little too small for my comfort level and could be choking hazards. So I removed those from the set and the kids didn't even notice. The people still look great! I do wish they offered more diverse people - its a white family with mom, dad and kids.
2747415
Bought them for our grandson who spends a great deal of time using his imagination to make all sorts of creatures and objects.  The blocks are fun, not only because they actually stick together better than traditional blocks, but the many different shapes allow a child to be more creative.