Basel Fasnacht is the most popular carnival celebration in switzerland every march.
It's a 3-day non-stop party in the whole city and every tuesday afternoon on the second day of fasnacht week is the one for kids.(Kinderfasnacht)
Everyone is dressed up with different kinds of costumes but the popular one is "Waggis Larve" a traditional basel mask ,It's somehow scary like the one on the picture below but that's one of the reason why Basel Carnival is so popular.
At first i wanted to bring my kids on the first day but my husband said it's better on the second day since it's for kids,no wild teenagers around and drunk adults lol
There are floats going around the city,giving small treats for the kids like sweets,small toys,stuffed toy etc.
I thought my Kids will get bored easily but no,they had sooo much fun getting the candies,eventhough we have a lot of sweets at home,i let them experience the joy of collecting candies from the scary "Waggis".At the end they're so proud of what they've got.
Check wikipedia for all the infos.
And for their yearly program check the official website of Basel Fasnacht.