Attention, puzzle fans! There’s a new review up on the Mr.Puzzle YouTube channel, an excellent source of reviews and solutions for the latest tinkering toys and amusements. This one is about the Ella Propella, from German company Constantin. It’s an acrylic dial sandwiched between a wooden propeller and a wooden disc base. The trick is to free a coin trapped between the dial and base. Mr.Puzzle doesn’t see this multi-layered containment trick as too difficult, but it does look like it could stymie the average sleuther for a little while.