It's fun to build with Rig-a-Jig

This is a toy I discovered when I bought a large set from a school supply store while teaching second grade in Florida in the 1980's. I stored all the little parts in an old tackle box and then had to referee the kids who all wanted to play with it during free activity time. They loved building with it; it was even more popular than Lego. Any such 3-dimensional building sets develop a child's spatial perception, which will be useful in math later on!
Unfortunately it is no longer on the market, but old sets frequently pop up on ebay and other online sales. You need this construction set!