My daughter is nearly 11 now and she absolutely LOVES building with these things!  It keeps her occupied for hours (no easy feat) and she has to use her imagination to make her creations, which as a mom I like, especially in this age of technology.  I would most definitely recommend this product!  I would love to buy the bigger, more expensive set, but they are pricy (but they ARE worth the money).  I teach preschool and my preschoolers enjoy this as much as my 11-year-old and her same-age friends do.  They come in a very handy container bucket with a lid for easy storage when not using them.