Using pictures off of google because my camera isnt working. All of the things im going to list, you will need toilet paper roles or a box/boxes
http://bunnyproof.com/wp-content/uploads/Rabbit-playing-in-digging-box.jpg
The diggy box! All you need is a box and shredded paper. When we made this up for our buns, we used their cardboard based litter which probly confused them, but its all we had at the time. They didnt care for it too much, but ive seen a ton of bunnies who really enjoy their diggy boxes. My nethie also likes totes full of snow in winter
https://s-media-cache-ak0.pinimg.com/236x/ac/f4/a7/acf4a7c9394823b843058cce9ebc66ce.jpg
This one is really easy. I call it a treat ball, but im not sure what its actually called. You take a few toilet paper roles and cut them about half an inch apart into little rings. Then you one through another, and another, and another, and another…. Before you completely close it, pop in a treat or some of your buns favorite pellets. Then, of course, close it up with another few rings and toss it to the bun! My Blue really loves these little treat balls. He throws them, botes them, digs at them, flings them, and finally tears them apart and munches on the treat. They never last long, but theyre fun for the buns and easy to make
http://bunnyproof.com/wp-content/uploads/Rabbit_toy_spring.jpg
The spiral toy. This is what it looks like without hay, because i couldnt find a picture on google that had hay in it. But, yea. Cut the toilet paper role into a spiral and add as much hay that will fit. Itll be a messy toy, but again, its easy to make and its cheap. My buns enjoy these because they have to dig and fling to get the hay out
https://i.ytimg.com/vi/Gsz3qIycPC4/hqdefault.jpg
Last but not least, the hidey box! You can have multiple boxes put together with holes in 2 to 3 of the sides, or you can get a big box and cut several bunny sized holes all over. My buns like these kinds of play areas because it gives them something new to explore, chew on, and run through