Here are some of the DIY toys I've made
Some of the things I've used: Cardboard, toilet paper tubes, paper towel rolls, paper bags, and twine.
Other supplies: a nail (for poking holes) scissors, and non toxic glue (I've only used this once or twice to keep a toy from falling apart. I only used a tiny bit in an area that would be very hard to get to for bunnies).
A lot of toys I have just stuffed with hay, some I put treats of pellets in.
One of their favorites are the ones with layers of different textures pieces of cardboard.
For those I just cut out different speed peices (or used scrap peices) and stabbed them with a nail until it piked through. Then I made a mess of the end of the twine so I could use the nail to string it through.
Sometimes I have to widen the hole with scissors.
The just repeat the process until you get it to how long you want.
For some peices I'd roll them up or fold them, for others I'd pull apart the layers (there's three: the top layer, the middle layer that look like waffle fries, then the bottom one. I keep the middle and bottom together most most times).
Sometimes I'll braid strips of the paper bag (just leave the end together, then cut two lines down it so end end up with three strips to braid). Sometimes turn the braided paper into a wreath like toy. Other times I'll put it into the other toy with the twine.
Here's what they end up looking like