I was seriously on the fence about these, but gave them a shot and I am so glad I did! These have turned out to be our #1 played with item. They are incredibly versatile...from roads, railings, buildings, bridges, to tunnels. They even stand up tall or on their sides if you slide them into the carpet. The only issue is that I have to clean them up every single day.
My 5 year old daughter loves these, and I have found myself trying to make the Leonardo bridge with some success. They are quite a bear to clean up after playing with them (we have a 1 year old who enjoys spreading them throughout the house), but the cleanup is worth the play. I would recommend this one for ages 5+.