What: Drawing around our shadows to see the way the sun moves – and how silly it looks when our shadows stretch or shrink!
How: You need a space long enough to do the shadows, that gets some direct sun. Our driveway is our preferred spot. Also, chalk. Then, it’s just a matter of when you do it. This week’s drawing was in honour of the winter solstice, done not long after dawn, so the shadows are at their longest for the year. On other occasions we’ve repeated the activity at noon or in the afternoon, so that you can see how the shadows point the same direction at a given time (they’re parallel) but point the other way later, or how they are much shorter at noon than they are early or late.
Extras: There’s so much to play with here, in the themes of astronomy, seasons, time and change. Winter and summer shadows are quite different in direction and size. If you do this activity every couple of months the kids may remember what it was like the last time (mine didn’t!) – or take photos to assist the comparison. You could stand on one spot and repeat the outline every hour or two to overlay a series of shadows for that day (older kids could talk more specifically about angles or measure lengths). There’s plenty to talk about how the sun moves, how it’s lower in the sky or higher with the seasons, how dawn is late in winter but very early in summer (if you’re getting up to do a dawn drawing!). My preference is to not talk much about it, but to try and do the exercise often enough that the kids themselves realise that something is changing and start the conversation themselves. Though more often they’ve gotten distracted by the presence of chalk and begun colouring in their own pictures and adding details – and that’s just fine too. At some point I will probably use this activity as a foundation exercise before we play with sundials – both the normal fixed kind and the kind where you use yourself as the gnomon. I’d love to build one of these in the garden with stepping stones! And of course there’s the survival skill of using the movement of shadows to find north, which is easier understood if you’ve spent time thinking about the idea that your shadow isn’t fixed or constant.
What: construction using gumdrops and toothpicks. This was one of a series of STEM projects I did over one set of summer holidays when we were trying to do at least one STEM thing every other day. I got the idea from the Tinkerlab book (which is much recommended and which I will review here eventually).
How: I think I used one bag of gumdrops that I tipped out onto a tray for better sorting through (seeing as some kids *have* to use The Right Colour), plus a spare bag in reserve if it was needed, and I had a couple of toothpick holders with double-ended toothpicks in them that could get passed around. I put them all out on the table at a family event, and children and uncles and grandparents all had a go.
Kid 3 is pattern-obsessed and enjoys visual-spatial stuff, and spent quite a bit of time doing extended 2D flat patterns with a very simple arrangement repeated. Kid 5 is much less spatial or directional, and had a lot of fun just playing and seeing what happened without repeats, but also stayed 1D and 2D. Eventually I built a 3D shape or two to show them that they could go up as well as out, seeing as they didn’t appear to have imagined that on their own, and Kid 3 happily copied it to see if they could. They had minimal success seeing as the gumdrops do tend to sag over time, and sometimes quite quickly if not placed carefully. But the idea was there. Kid 5 was surprisingly engaged with the activity and took quite a while to start asking if they could eat the gumdrops yet – it’s usually the first thing mentioned.
Extras: there’s so much you could try here. Marshmallows instead of gumdrops, kebab skewers instead of or as well as toothpicks to get different length sides. It was hard to do long sides using multiple segments as they did tend to sag, so you couldn’t easily do big structures with just the toothpicks – but you could try. Copying interesting architectural structures – e.g. building the Eiffel Tower, seeing if you can make all of the regular-sided polyhedrons, or just build a Monster Truck model or a T-Rex. Or go the other way for a more junior age group, and see what 2D shapes you can build. What *does* a 36-sided shape look like anyway? And how many toothpicks and gumdrops do you need? Any kind of construction that suits your fancy. All should be possible with patience. And possibly blue-tack instead of confectionery, though that’s not nearly as much fun!