As soon as you find one of the friendly Glidey Birds it'll follow you around like a little doggy.

But unlike with a doggy, you can grab its legs while being somewhere in midair (well, you CAN try it with a doggy, too, but.. I dunno) and it'll grow to a nice Glider size, slowing down your fall. This is not only fun, it'll also let you fly where you never went before!

Most Glideys live close to the Ynt Gardens, but you may find them at other places, too.