Students rub each wooden piece on a sanding pad until the edges are smooth, then lay the pieces out on the board to build their design.同學把每一塊小木片放在砂紙盤上磨，磨到邊邊光滑，再把木片排到板子上拼成作品。
The table is covered with pieces of wood.桌上放滿了木片。
Pick up one block at a time.一次拿一塊就好。
The sandpaper is round and flat.這個砂紙是圓圓平平的。
We sand the sharp edges away.我們把尖尖的邊磨掉。
Touch it — is it smooth yet?摸摸看——磨得夠光滑了嗎？
Then we build our own design.接著我們組裝自己的作品。
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