I rarely buy my rabbits toys... not because I am cruel, but because I went through a stage of buying so much for them and spending a fortune, and if i'm honest they rarely played with them!
I do buy willow toys and sticks as they enjoy them, they have commercially made tunnels, but what they enjoy most of all are cardboard boxes and toilet roll tubes stuffed with hay! I give the piggies brown paper bags stuffed with hay as they like to get inside.
I get the large paper bags from Primark I buy one thing and ask for a large bag, Usually I am buying towels for buns or tea towls for rat hammocks