Oakwood Academy's winter carnival is coming up, and Mr. Boyd is in charge of ordering the craft kits again. He knows he ordered 11 boxes of snow globe kits last year but can't remember how many kits come in a box. He checks the records and finds that the school used 122 of the snow globe kits last year and had 10 left over after the event. How many snow globe kits come in each box?

To determine how many snow globe kits come in each box, we start by setting up the information we have.

1. Mr. Boyd ordered 11 boxes of snow globe kits.
2. The total number of kits used was 122.
3. After the event, there were 10 kits left.

Let's denote the number of kits in each box as \( x \).

The total number of kits ordered can be expressed as:
\[
11x
\]

According to the information given:
- Total kits used = Total kits ordered - Kits left over
- Rearranging this, we get:
\[
\text{Total kits ordered} = \text{Total kits used} + \text{Kits left}
\]
Substituting the values, we have:
\[
11x = 122 + 10
\]
This simplifies to:
\[
11x = 132
\]

Now, to find the value of \( x \), we divide both sides by 11:
\[
x = \frac{132}{11} = 12
\]

Thus, the number of snow globe kits in each box is
\[
\boxed{12}
\]