Bingo - able to adapt online for different themes
Go to www.dltk-cards.com/bingo and choose which theme you want bingo cards for. You can print off the calling cards and as many different bingo cards as you need - refresh to change the pictures on the card (or close current card and create a new one).
Pennies/counters/stones etc to cover pictures as called. Decide on what to award prizes for beforehand (1 straight line, horizontal, vertical, full house, etc).