What’s This?

A contestant is shown four small prizes. For each prize, s/he sees two digits, but only one is right. Either the first digit shown is the correct first digit or the last digit shown is the correct last digit. For each small item guessed correctly, the contestant wins a chip. Bob gives the contestant a free chip just for playing the game, so five chips can be earned. The contestant climbs to the top of the Plinko board and drops the chips one at a time. The pegs send the chip bouncing all over the board until they land in slots representing money amounts at the bottom.