This Guess the Number activity is a perfect way to revise numbers to 100. In this activity, 3 to 4 students place a crown on their heads. Without the students seeing, a number card is placed on each of their crowns using blutac. They then need to ask the class questions to help them guess their number. The first to guess their number wins. Print out the crowns, headband pieces, and number cards onto coloured cardstock. Then assemble the crowns and place them close to your whole class learning space.