Successfully complete a stage with the time having the last two digits of the same number to have a different color Toad House with bonus at the start of the next World:

Have a time ending in 11, 22, or 33 for a red Toad House that awards items.
Have a time ending in 44, 55, or 66 for a green Toad House with a mini-game for an extra life.
Have a time ending in 77, 88, or 99 for an orange Toad House with a Mega Mushroom.