I traveled to Pella Iowa a couple of weeks ago for the Tulip Time festival. It truly is a wonderful small-town festival with so many things to see and do. My primary interest was the tulips and the gardens, but that is by no means all there is to do. They have a daily parade, live performances at various locations, many street vendors and cafes, informational presentations about Dutch culture, and on and on. Do a Google search or the two primary websites for information about the event seem to be:
https://www.pellahistorical.org/tuliptime
One piece of advice I have for anyone going to Tulip Time is to plan well ahead of time for your visit and know where you will park and how you will get around. During Tulip Time the population of Pella grows from its normal 11,000 to something in excess of 100,000 people. To say the least, getting around can be a challenge. The Pella Historical website (above) has information related to getting around during Tulip Time.
A few pictures from my visit.