Geno actually built the brown tower with the prisms!! He has never, ever attempted even using them before, and we have had them since about a year ago. I made a booklet last week of different things that could be built with the brown prisms and pink cubes, and combinations of both of them...took pictures, developed, laminated and put them together in a booklet that sits on the shelf with the prisms and cubes. Well, that booklet really peaked his interest, as I was hoping, and he built the tower. He had also just spent the previous evening building towers with the family, so perhaps he was still feeling motivated to build.
The funny thing is, I had been thinking that he was avoiding them because he thought they were too easy. But, perhaps it was that he really didn't understand, and it was actually a bit too challenging, since he has never been very interested in building. Whatever the reason, it was great to see, and I look forward to seeing all the children take more interest in these materials!