Discovery DIY Light-Up LED Terrarium Geodome Crystal and Plant Grow Science Kit

• Amazon now offers the Discovery DIY LED Crystal Plant Ecosystem Kit, now $9.99 (was $17.99).
• Prime members get free two-day shipping, and regular members get free shipping on orders over $35 within the contiguous U.S.
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Editor's Pick: If your kids want to get hands-on at home without staring at screens all day, this kit is a great fit. Plant the ryegrass seeds, then follow the steps to grow three crystals in different colors — the whole process feels like building a tiny planet. The base comes with LED lights that turn on with a button press, making it a fun bedside display at night. All materials are included, so no extra purchases are needed.