{"product_id":"reverse-sand-and-liquid-timers-set-of-6","title":"Reverse Sand and Liquid Timers Set of 6","description":"\u003ch2\u003eThe sand floats upwards - about $18.90 a timer\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eSix timers, 8.5 x 3 x 13.5cm each, in which the sand rises instead of falling. Run time varies between 2 and 3 minutes depending on temperature.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThese are a teaching resource, not a toy.\u003c\/strong\u003e The supplier is explicit and so are we: they must be used with care, they may break if dropped from a height or used with force, they need adult supervision, and they must not be accessible to children without it. Each is filled with mineral oil. Recommended for children aged 3 years and older.\u003c\/p\u003e\u003cp\u003eWith that said, the reason to buy them is that they break an assumption. Every child knows sand falls. Watching it rise is the moment a five-year-old starts asking why - and that question is worth more than any worksheet on density.\u003c\/p\u003e\u003cp\u003eThe variable run time is a feature rather than a fault. Warmer oil runs faster, so the same timer is quicker in a sunny room than a cold one, which is a second experiment sitting inside the first.\u003c\/p\u003e","brand":"MTA Essentials","offers":[{"title":"Default Title","offer_id":53792614646123,"sku":"EVMEA1007","price":113.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2795\/8891\/files\/mea1007_reverse-sand-and-liquid-timers-set-of-6_v1_1.webp?v=1788346761","url":"https:\/\/megaofficesupplies.com.au\/products\/reverse-sand-and-liquid-timers-set-of-6","provider":"Mega Office Supplies","version":"1.0","type":"link"}