𝐇𝐨𝐰 𝐒𝐜𝐢𝐞𝐧𝐜𝐞 𝐖𝐨𝐫𝐤𝐬

✅Author: Judith Hann, 192 trang, bìa cứng, tình trạng tốt
✅Suggests simple experiments that demonstrate facts about chemical reactions, energy, motion, light, sound, air, water, magnetism, electricity, electronics, and computers