See who can remember how many HP items are on the tray.
Tray or table
Cover (sheet or blanket)
HP related items (how ever many you want)
Paper
Pens/Pencils
Place HP items on tray or table and cover.
When everyone is in place uncover the tray or table.
Either walk around with the tray or have all the people look over the table.
Leave the cover off for 1 min.
Give everyone 5 minutes to remember what they saw.
Who ever remembers the most wins!