When the kids were very small my dad bought Elizabeth a Red Radio Flyer wagon. The wagon, the best toy ever. Can be used in a zillion different ways by every single kid. You're only limited by your imagination. Jer and I used to go for fairly long walks pulling that wagon with toddle Elizabeth all wrapped up in padding blankets and warm mittens.
Leave it to my kid.
I remember the day when the kids were quite young, John was maybe 4 and Liz was 7ish. Elizabeth was angry at me for something and had decided to run away. And John was going with her, blindly following her, as he used to do, letting her call the shots.
The two of them loaded up the wagon with their important things, including special stuffed animals, snacks, juice boxes, and coats in case it got cold at night on the road.
Someone else might have tried to talk the kids out of running away. Or followed them on a bike or something. Someone else might have fretted. But I was mightily entertained. They were on an adventure...down the block and around the corner pulling their red Flyer Town and Country model wagon. Laughing.
While preparing to run away together, Elizabeth's anger was gone and John was contributing to the project with his enthusiasm and good ideas. She and John were having conversations about what to take, what they were going to go on their trip, where to go. They were psyched. The kids were in this thing together; they were on an adventure. They started off down the street as I sat on a seat on the front porch, watching. Of course they came back within a very few minutes. Once they turned the corner on that sparkling, sunny day and lost sight of the house they realized that they were on their own and the fun was reduced quite significantly.
They returned home and unpacked their Radio Flyer.
Today they talk about that adventure like it took hours.