Enter this week's caption competition at:
www.tes.co.ukschools_outcaption_competitionYou could win a pound;10 Oddbins voucher(pound;5 for the runner-up)
LAST week's picture (BELOW) winner
CAREFUL - THESE THINGS DON'T GROW ON TREES, YOU KNOW!
A young Bamber Gascoigne calculates the co-efficient of air viscosity before going for the kill Ping