Here are some places where it's hidden at:

• Center at Stinkatolli
• Center left of Stinkatolli
• Top left of Stinkatolli
• Behind the Yellow can at Junkatolli
• By the White J on the Mechanical Shop
• Bottom left corner at Junkatolli
• Behind the fork next to the orange building at Tinkertown
• Inside the little hut saying ''Seed'' at Tinkertown
• On the walkway to the Tinkamaker