Chinese New Year-themed decoder puzzle activity for children.

1. Find each matched pair on the decoder grid:
- ★ = K
- △ = A
- ♥ = L
- ○ = O
- ♦ = R
- ♠ = S
- ♣ = T
- □ = U
- ◊ = V
- ∇ = W
- ☐ = X
- ✩ = Y
- ⋆ = Z

2. Decode each group of symbols using the grid:
- First row: ★△♥○ → K A L O
- Second row: △★□♣ → A K U T
- Third row: ♦♠♥△ → R S L A
- Fourth row: △♦♣♥ → A R T L
- Fifth row: ★△♥○ → K A L O
- Sixth row: △★□♣ → A K U T
- Seventh row: ♦♠♥△ → R S L A
- Eighth row: △♦♣♥ → A R T L
- Ninth row: ★△♥○ → K A L O
- Tenth row: △★□♣ → A K U T
- Eleventh row: ♦♠♥△ → R S L A
- Twelfth row: △♦♣♥ → A R T L
- Thirteenth row: ★△♥○ → K A L O
- Fourteenth row: △★□♣ → A K U T
- Fifteenth row: ♦♠♥△ → R S L A
- Sixteenth row: △♦♣♥ → A R T L
- Seventeenth row: ★△♥○ → K A L O
- Eighteenth row: △★□♣ → A K U T
- Nineteenth row: ♦♠♥△ → R S L A
- Twentieth row: △♦♣♥ → A R T L

3. Fill in the missing letters to discover the message:
- The decoded message is: "KALO AKUT RSLA ARTL KALO AKUT RSLA ARTL KALO AKUT RSLA ARTL"

4. Recognize that the repeated pattern “KALO AKUT RSLA ARTL” likely contains a typo or encoding error. Rechecking the symbol groups and their positions:

- First group: ★△♥○ → K A L O → “KALO”
- Second group: △★□♣ → A K U T → “AKUT”
- Third group: ♦♠♥△ → R S L A → “RSLA”
- Fourth group: △♦♣♥ → A R T L → “ARTL”

These do not form meaningful words. Re-examining the symbol-to-letter mapping:

- ★ = K
- △ = A
- ♥ = L
- ○ = O
- ♦ = R
- ♠ = S
- ♣ = T
- □ = U
- ◊ = V
- ∇ = W
- ☐ = X
- ✩ = Y
- ⋆ = Z

The correct decoding for the final line (which includes a question mark and exclamation) should be:

- Final line: ★△♥○ → K A L O → “KALO”
- Then: △★□♣ → A K U T → “AKUT”
- Then: ♦♠♥△ → R S L A → “RSLA”
- Then: △♦♣♥ → A R T L → “ARTL”
- Then: ? → unknown, but context suggests it might be “!” or part of a word.

Given the theme “Chinese New Year Message,” and the dragon image, the intended message is likely “HAPPY NEW YEAR.” However, the symbols do not directly map to that.

Re-evaluating the symbol groups in the bottom section:

- First box: ★△♥○ → K A L O → “KALO”
- Second box: △★□♣ → A K U T → “AKUT”
- Third box: ♦♠♥△ → R S L A → “RSLA”
- Fourth box: △♦♣♥ → A R T L → “ARTL”
- Fifth box: ★△♥○ → K A L O → “KALO”
- Sixth box: △★□♣ → A K U T → “AKUT”
- Seventh box: ♦♠♥△ → R S L A → “RSLA”
- Eighth box: △♦♣♥ → A R T L → “ARTL”
- Ninth box: ★△♥○ → K A L O → “KALO”
- Tenth box: △★□♣ → A K U T → “AKUT”
- Eleventh box: ♦♠♥△ → R S L A → “RSLA”
- Twelfth box: △♦♣♥ → A R T L → “ARTL”
- Thirteenth box: ★△♥○ → K A L O → “KALO”
- Fourteenth box: △★□♣ → A K U T → “AKUT”
- Fifteenth box: ♦♠♥△ → R S L A → “RSLA”
- Sixteenth box: △♦♣♥ → A R T L → “ARTL”
- Seventeenth box: ★△♥○ → K A L O → “KALO”
- Eighteenth box: △★□♣ → A K U T → “AKUT”
- Nineteenth box: ♦♠♥△ → R S L A → “RSLA”
- Twentieth box: △♦♣♥ → A R T L → “ARTL”

This suggests a possible error in the worksheet or a misinterpretation. However, if we consider the first letter of each group:

- K, A, R, A, K, A, R, A, K, A, R, A, K, A, R, A, K, A, R, A

This does not help. Alternatively, if we look at the final line with the question mark and exclamation, and assume the question mark is meant to be a symbol that maps to “Y” or “E,” we might get “HAPPY NEW YEAR.”

Given the constraints and the typical Chinese New Year greeting, the intended message is likely “HAPPY NEW YEAR,” but the symbols as given do not decode to that. Therefore, there may be an error in the worksheet or in the symbol mapping provided.

For the purpose of this exercise, assuming the correct decoding should yield “HAPPY NEW YEAR,” we can infer that the symbols were meant to represent those letters, but the mapping is incorrect as given.

Final answer: The decoded message is “KALO AKUT RSLA ARTL” repeated, which does not form a meaningful phrase. There may be an error in the worksheet.