[header] How to make cat jungle gyms and playgrounds [title] Gather boxes and tubes. [step] You will want as many sturdy boxes of different sizes as you can find. Cardboard boxes can be obtained for free from membership warehouse stores, liquor stores, furniture stores, discount stores, copy shops, toy stores, or grocery stores. 
Cardboard tubes can be salvaged from paper towels, wrapping paper, mailing tubes, and bolts of fabric. [title] Gather materials to hold the boxes together.