Surefire way to give your kid a cold:
Step 1) Take kid to nursery for the first time.
Step 2) Spend a couple days in a well air-conditioned home.
Step 3) Feed kid early dinner
Step 4) Take kid outside into the heat, and get in hot car.
Step 5) Crank up the air-conditioner until car is nice and cool.
Step 6) Take kid out of car into heated parking lot.
Step 7) Take kid into air-conditioned mall.
Step 8) Feed kid nice sugary fruit snacks while rest of family eats Chinese.
Step 9) Go out into the heat again.
Step 11) Have a temporary lapse in sanity.
Step 12) Go back with wet kid into air-conditioned mall for ice cream.
Step 13) Give kid some of your nice, sugary ice cream.
Step 14) Go back out into the heat and get in hot car.
Step 15) Cool car.
Step 16) Hot garage.
Step 17) Cool house.