In the wild, budgies spend much of the day searching for seeds, moving with a flock and chewing at things. A cage with food, water and two perches gives a bird very little of that to do. Toys fill the gap, but only if they are safe and don't go stale.
Birds get bored of the same toy, so a common approach is to swap toys about once a week. Variety matters more than a crowded cage: a few good toys beat a cage packed so full that your budgie can't flap or move around.
Tell us how your budgie feels about toys and how many toys fit in the cage without crowding the perches (2 to 4). You get a four-week plan: one familiar toy stays each week so nothing is all-new, and the rest change.
My budgie and toys
Swap roughly weekly, keep one familiar toy, and check every toy for anything that could trap a beak, toe or tongue.
Most toy accidents come from design, not from the bird misbehaving. Before a toy goes in the cage, look for:
Safe bits to shred include plain paper, coffee filters, brown paper bags and cardboard from food-grade boxes. Don't assume that something labelled "bird toy" is safe: inspect it yourself and replace it when it is chewed down or damaged.
Foraging makes meals a task, but it should never replace a meal. Keep the usual food bowl available, and watch that your budgie keeps eating and passing normal droppings. If your bird eats less, seems fluffed up, or acts unwell, ask a vet who knows birds: that is a health question, not a toy question.