So, you asked Toni to come with you but that damned elephant has now broken the glass.
Well, don't ask me! Or, actually, these are the tips. So, go ahead. Go to the balloon house and inspect the shards.
Take the shard of glass and click on the glowing place. Take the elephant skin.
With the shard of glass you can find out the elephant traces. Just follow them until you find something interesting.
You found the hideout. Now just to get that Muck to guard the exit while you search.