What remedy if you could only buy one remedy for childhood would I recommend…easy…Arnica. Without a doubt I think every home should have this amazing remedy in both the topical and internal varieties. Childhood is all about bumps and bruises and nothing even comes close to Arnica in keeping bruising and swelling down. It helps ease the pain of trauma and stiffness. This remedy is fantastic for big kids too so I recommend a 6x, 30c, 200c and a topical for around the house. Remember for best results to use the topical immediately after the injury and to NOT put this on a open wound of any kind (that would be calendula).