Interesting, learn something new everyday. I guess I call some rope toys, some chew toys (esp with wood blocks or leather), some challenge toys (holds a nut/treat inside a 'cage' toy), etc.. Never been to a bird fair sadly, just seen the selection at pet store (and I've rehung new wooden blocks on older hanging 'chain' toys for him before).
I guess I pictured a foot toy more like when I hand mine a popsicle stick or cardboard strip (foot sized hold-able) or even twisted paper he can hold and chew. Although, mine usually wants to play 'pick up' with such loose toys (Um, he drops, I retrieve). lol
Mine loves to grab the bell on hanging chew toys so he can immediately remove the clacker inside. I usually ending up replacing the bells on new toys with older bells I've kept (if possible -- some toys are more easily modified than others). Anyway, my older/stronger bells can still ring -- and gives him some challenge to try and remove their clackers.