Do your students want a fun addition and subtraction practice page that aligns to your unit on seeds and plants? This math mystery message requires students to solve addition and subtraction math problems and use the answers to unlock a mystery message. The question is: What does a seed need to grow? The mystery message is: water, soil and sunlight. This is a perfect math activity to give your kids during your unit on seeds and/or plants! Your first graders will love it!