[DETAIL]<br>Description<br>Report Item / Suspicious Activity<br>Features:<br>1, digital teaching roller seal, fun teaching, let children love learning.<br>2, math problem practice seal, roll a roll math problems appear in front of you.<br>3, can mobilize random questions, gently twist the button, you can change the topic.<br>4, oil hole oil add ink, can be recycled, ink alignment with the oil hole, drop ink.<br>5, delicate, small and convenient to carry, accompany your children to practice at home, smart growth.<br>Parameters:<br>Style: Addition/subtraction/multiplication/division<br>Color: Blue/pink<br>Product list:<br>1* seal +1* oil<br><br>[ATTRIBUTES]<br>- High-concerned chemical: None<br>- Origin: Mainland China<br>- Subject: Mathematics<br>- High-concerned chemical: None<br>- Origin: Mainland China<br>- Subject: Mathematics