How to fold the peg perego aria twin stroller?

Locate the fold button on the side of the handle (It has a red arrow on it). Using both hands, slide both buttons up and push the handle forward. The stroller should fold up. Then push the handle down to lock everything in place.

Do you have the instruction manual? Read it to get instructions, go to the store to get a new booklet (if you lost it), or borrow a copy from someone with the same stroller.