Shape a pipe cleaner into a circle, twisting the ends together to secure.
Attach another pipe cleaner onto the circle by twisting its end around the circle and then back on it.
Link the other end of that pipe cleaner to the opposite side of the circle, forming an arch.
Add another pipe cleaner in the same way. And add another pipe cleaner too – to like a simple, domed cactus.
Use yarn to make a DIY pompom and leave the tails long to tie onto the cactus. Tie the tails of the pompom around the top of the pipe cleaner cactus and then trim the excess.