I remember playing with some version of these when I was a child, and the fun hasn't changed. These are a great way to inspire creativity.
For some children these are going to be easier to use to build with than standard blocks because these will stick together when the child wants to build something. They are also easier to pull apart than the standard brick style building toys. These are so much easier to handle.
These blocks will connect in nearly any way, so it makes them more versatile for any age. These blocks will grow with the child.
The bristles and colors are excellent for sensory development.
These are strong, durable, fun and will bring out imaginative play at any age.
This particular set of blocks is made of durable plastic. There is no odor issues with the plastic that I noticed, and that can be a sensory problem for some children. The blocks are brightly colored, easy to work with, and the tips do not break off as you pull them apart and put them together again. These are well made.