Puzzle 1
This is a well known children's musical piece, the vowels (AEIOU) have been removed, and the remaining letters have been grouped together.
Can you determine the correct words?
hmpt ydmp tyst nwll hmpt ydmp tyhd grtf llll thkn gshr ssnd llth kngs mncl dntp thmp tytg thrg n
Puzzle 2
Can you make this equation correct by moving exactly one matchstick?

Note: this puzzle is not interactive, and the matchsticks cannot be moved. The matchstick layouts for each digit are:
Puzzle 3
What number comes next in this sequence:
1 · 8 · 9 · 64 · 25 · 216 · 49 · ?
Puzzle 4
Each of these words can have the same letter placed at the beginning and the end to form a new (common) word.
For example, -LIT- becomes ELITE by adding an E at both ends.
What are the new words?
-eve-
-able-
-carve-
-as-
-on-
-ode-
-elude-
-ape-
-ate-
-rod-