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These buzzworthy products were the most notable toys at Toy Fair 2011

Hoping to cut into some of LEGO’s hold on the building block market, Hasbro is introducing a new building line called Kre-O, which is compatible with LEGO’s blocks. The first line will feature characters from the “Transformers” movies. Another building system — Uberstix — is not only compatible with LEGO, but was also designed explicitly to mate with Erector and K’Nex as well. The Uberstix philosophy, though is not to take over other brands, but to give kids as many play options as possible to increase creativity, save money, and …