as I play on i/2 speed and found all collectables sooner in the game maybe they didn't disappear so fast because my other two tribes I ran on 2x speed and found the last collectable by accident when I had actually gave up!

pause to grab kids was something I found by accident I grabbed a kid on a rare collectable then realised this kid was well a (deleted word as not to offend) Dullard so I grab another and both took it to the scientists and I got tech points even though it was a NEW rare one, from then on I paused and grabbed the kids to gain tech points when they found a NEW uncommon or rare thingy!