Estimation Jar Game - Guess the Number of Marbles #98181 (License: Personal Use)

This digital estimation jar activity features two side-by-side jars: the left jar shows a partially filled transparent container with 28 visible marbles (displayed above), while the right jar is fully packed with colorful marbles and obscured by a large red question mark, inviting users to guess the total. The interface includes difficulty levels (Easy, Medium, Hard) and interactive buttons (“Reveal”, “New”) to support repeated play and learning. Designed for math fluency and visual estimation practice, it’s ideal for elementary education settings.

Used in educational websites, classroom digital tools, or math learning apps to teach estimation, counting, and number sense. Matches user intent for interactive, gamified learning resources for children aged 6-12.