Lyle stops me from casting spells. How can I cast

Hint 1 of 5:

If you were sneaky, or stealthish, he wouldn't see you.

Hint 2 of 5:

Did you attend the General Magic 201 lecture ?

Hint 3 of 5:

READ NOTES to find a plant that makes someone stealthy.

Hint 4 of 5:

Make the Simpleberry Bush in the Appliance.

Hint 5 of 5:

SHAKE BUSH before going into TKB's basement.