We've done most of those. There is a local small pond they drain each winter and fill around Memorial Day, so in the spring it's just a large puddle - perfect for tadpoles & salamanders. So we've strapped on the rain boots and dug up tons.
i haven't tried the fruit quarters though. Instead we've made home-made bird feed with seeds, pine cone and seeds. We 'painted' the pine cone with the peanut butter then rolled it in seeds, then we hung it from branches. The kids love watching the birds while eating breakfast. (As do our cats! Lol)