1, girls can wear floral dresses with suspenders, strapless dresses, T-shirts+denim shorts, printed suspenders, white cotton and linen shirt dresses, one-shoulder skirts, blue and white striped tube top dresses, etc.

2. Boys can wear T-shirts+shorts, shirts+beach pants, vests+shorts and so on when they go to the seaside.

Generally, girls can wear whatever they want when they go to the seaside. If they want a simple style, wear a white T-shirt with denim shorts. If they want to be ladies, they should wear strapless dresses.