Instructions
Begin one of the stages that correspond to spring -- Levels 1 or 5. Go to Springtime Square and take the missions from the Minister of Spring. (This changes depending on the level.)
Complete the tasks that you're given and then return to Springtime Square. The Minister of Spring should take you to see Queen Clarion in preparation for the spring festival. To the right of her is a closed flower.
Put the stylus over the flower and draw a triangle around it four times; this will cause it to sparkle, and then it will open, displaying an orange crystal. Tap the crystal to go to a secret area to collect bonus items.