you wanting ideas for baskets, then for the 16th month old. Webbles, little people, color wonder, cars, books, bath toys. For the 8 year old books, toys for outside, coloring books, cars, games. For crafts then make easter eggs out of paper and stickers, easter cookies,egg hunt, family fun website has good ideas.
also thought of socks which will fit into eggs, smarties candy, pezz candy dispensars, silly bands, last year for the girls we hid gift cards for bookstore or target or walmart or even mcdonalds and loved them just as much, coins, Since different in ages might do the older kid a different color than the youngest so can do the right age group for gifts,