Look at the bird feeder your group built earlier in this project. Which of our three jobs do you think it already does well: holding seed, keeping seed dry, or giving a stable perch? Hands up for your strongest guess.

Score each job 0, 1 or 2:

• Holds seed: 0 = most seed falls out; 1 = holds some but leaks when moved gently; 2 = holds seed securely when lifted a little.
• Stays dry: 0 = seed soaked; 1 = partly wet; 2 = seed stays dry.
• Stable perch: 0 = tips or collapses under two fingers held for a slow count of three; 1 = wobbles but stays up; 2 = stays steady.

How does using the same spoon, shower and perch check keep the dry test fair?

Before any feeder is tested, we practise the shared ten-second control together.

Test your feeder against all three success criteria. Finish the two table checks first, then join a pour-station queue for the shower. Score each check 0, 1 or 2 using the key on the board:

• Holds seed: 0 = most seed falls out; 1 = holds some but leaks when moved gently; 2 = holds seed securely when lifted a little.
• Stable perch: 0 = tips or collapses; 1 = wobbles but stays up; 2 = stays steady. Use a firm two-finger hold for a slow count of three — stronger than a real bird, so if the perch stays steady it is doing well.
• Stays dry: 0 = seed soaked; 1 = partly wet; 2 = seed stays dry.

1. Holds seed: put one level spoon of seed in the feeder, lift it a little, and watch.
2. Stable perch: hold two fingers down on the perch for a slow count of three.
3. Stays dry: set the feeder on the tray at a pour station and give it the ten-second shower from the agreed height.

Each group will call out its total first-test score out of 6. We will type the totals into the table on the board, then show the chart.

Which bars are tallest and shortest? What does a short bar tell an engineer to work on first?

Now a quick show of hands: which job scored lowest for your group — holds seed, stays dry, or stable perch? Which feeder job pulled most scores down across the class?