I like making things with products I buy from the 100 yen shop.
I enjoy building stuff around my house with things I buy at the 100 yen store.
この場合、次のような言い方ができます。
ーI like making things with products I buy from the 100 yen shop.
「100均で買う商品でものを作るのが好きです」
products I buy from the 100 yen shop で100均のアイテムを言えます。
ーI enjoy building stuff around my house with things I buy at the 100 yen store.
「100均で買うもので家の周りのものを作るのが楽しい」
things I buy at the 100 yen store でも100均のアイテムを言えます。
ご参考まで！
カナダ 
