When it’s time to play tooth fairy, it’s good to have a plan.

Local design studio Notion Farm has the trade covered with the Official Tooth Fairy Kit. You and your tot fill out a beautiful certificate of record stamped with the fairy’s seal (multiple exchanges make for a frame-worthy keepsake).

The milk tooth goes into an envelope attached to the form and the form into a silk-screened trading bag. At bedtime, your gap-smiled cherub tucks the bag under his pillow to bait the fairy. The prize? Up to you.

Just don’t bite off more than you can chew.

Available online at officeofthetoothfairy.com.

For more ideas, sink your teeth into our other local editions.

ARGH
Ecopirates
What: Themed playtime for toddlers (ages 2-4) and mums in a stunning preserved park area.
Why: Land ho!
When: Fri., 10-11:30 a.m.
Where: Crissy Field Center, 603 Mason St., at Halleck St. Register at 415-561-7765.

SEE
National Acrobats of China
What: Cal Performances presents awe-inspiring antics from the world-famous troupe.
Why: Kids’ tix are half price.
When: Sat., 2 & 8 p.m.; Sun., 3 p.m.
Where: UC Berkeley, Zellerbach Hall, at Telegraph Ave. & Bancroft Way, Berkeley (510-642-9988).

SKATE
Holiday Ice Rink in Union Square
What: The ice is open for one more week of balmy gliding.
Why: Merry go round.
When: Thru Jan. 19.
Where: 333 Post St., b/t Powell & Stockton Sts. (415-781-2688).