The best bunny toys I know are not bought in stores, other than the cat toy hard balls with bells in them. Papertowel tubes and other cardboard tubes are great fun to nibble on, to roll around, etc. Dowels - unpainted plain old dowels that you can buy at a hardware store are fun for some bunnies to nibble on. Sticks are good, just sticks from a tree, to nibble on. Our bunny gets poplar sticks, apple tree sticks - just about any fruit-tree or maple tree stick is good, just let them "age" for a week after you break them off the tree or bush ... then she likes to eat the bark, and sometimes the whole stick. It's good for gnawing on, ahich all bunnies need to do. There are hard treats that are sold in most pet stores - they are appanetly yummy, but also keep the bunny occupied with nibbling ...
Corrugated cardboard boxes are particularly fun, as they are good to dig at, to peel the layers apart from, etc., etc. Sure, the bunny'll ingest some, but usually not a lot, and it doesn't cause any harm as long as they are getting regular food, too.

Metal shelves, you know, the "wire" shelves you see everywhere, tilted against the wall, can protect your mom's baseboards for the week ...

Hope I've helped!