Games that have numbers, letters, pictures on little tiles that go in a frame.
using a Shoe Insert Shape Holder (Shoe Tree). Questions About Belts on Shabbos;
more examples of "מבטל כלי מהיכנו" (nullifying a vessel from its normal usage) that come up on Shabbos;
how to work with opening different types of boxes (matzah, cereal, etc.) on Shabbos;