We stopped by Wendy's a few days ago and the current toy are these things called Smart Links.
They don't seem to be a real product you can buy aside from in the meal...
Naturally my kids love them. We got a fair number and I could get a fair number more if I went out and bought 3 more meals but wanted to see if someone could suggest something like them I can buy on their own?? They're just these plastic shapes that fit together in a bunch of nifty ways.