Here are a few little ideas which I think are a teenie bit different.
Peas! Lovely little treats all poured out on the high chair tray and they are great for developing finger dexterity!
Also sweet potato chips (sliced then put on a baking tray with a tiny bit of oil)
also slice up banana and shake in a sandwich bag with some oatmeal, the oats coat the banana and stop it being so slippery.
Good Luck! xx