It's the day of the Inis Spraoi boat race. The kids have made their own boats to race in the waterbasin; but some of them won't float. They sink to the bottom; and the kids can't figure out why. Conor suggests a trip down to the dock to see if Skipper Seamus can give them the answer. / It's too rainy to play outside and Sean's not impressed - he hates getting wet; and he can't go on the seesaw with Ciaran. Together the group head down to the dock; to find out if Hermie Crabnik prefers the sun or the rain.