I initially bought this set for my three-year-old grandson to play with at my home. First time the set was taken out of the box, my four-year-old grandson joined in the fun and it became apparent from their long periods of building and playing that another set would increase their fun. Soon after the second set arrived, my eight-year-old grandson joined in the fun of building, which expanded from cars and trucks to creative gardens on wheels with fountains. However, all three grandsons seemed to need the same pieces at the same time, limiting the creativity and play. Yes, there were opportunities for learning how to share, but still the creativity was being limited. Knowing the relationship between creativity and brain development, of course I bought a third set. The basket holding all three sets is the "go to" when they arrive at my home. I like this set because it appeals to a broad age range, 3-8, and, as such, is a great relationship building activity for all three boys. I also like that the pieces are easy to assemble into the vehicles pictured on the box, and the variety of colors and shapes encourage creativity beyond the box pictures. Thank you for this wonderful building set! Our three sets will likely be passed on to the next generation.