These kids keep getting stuck on stuff and losing their items! One got stuck on the line of blue flowers over in the "ancient" place, one got stuck because evidentally the item was out too far into the water so she couldn't get back out of the water, and the other got lost because the kid got stuck on the corner of that thing sitting on the beach.

Plus - someone needs to teach my kids how to play tag because I don't think they quite understand.

The shells in the sea.. try putting the kid down to the right of and a little above the shell instead of right on top of the shell. You don't have to put a kid dead on top of the collectible if the collectible is in an awkward place

best to put them above like bajantara said for best chance of picking them up.

My kids get the collectible, run to give it to the scientists, then get stuck on the fire. It looks as if they're dropping their mushrooms and collectibles into the fire!