My daughter and I made a garden pond a month ago, using an old tin bath. Today, while litter picking at the dried up riverbed in potton - we spotted half a dozen tiny frogs. We went home and put some water from the water butt into a small bucket and returned to rescue you what we could. Needless to say we now have five baby frogs in our small garden pond! My daughter is thrilled to finally have some wildlife in there, but my question is; do I have to do anything in particular? Buy them food etc? 
No easy way to say this, but they should not have been moved. Amphibians come to water to breed. They do also use water to cool down, but most of the time, they need to be out of water to feed. Moving both tadpoles, young frogs and adults around risks moving disease around unnaturally.
Are the frogs able to get out of your water feature? Looks like they should be able to jump out, judging by the photo. But, at that sort of size, many bird species would find them an easy catch in your pond. Birds like blackbirds for example.
The frogs may have been where they were as that could have been where the spawn was and where they developed as tadpoles. Most don't survive to adulthood, but moving them away from their own area shortens their chances.
Are the frogs able to get out of your water feature? Looks like they should be able to jump out, judging by the photo. But, at that sort of size, many bird species would find them an easy catch in your pond. Birds like blackbirds for example.
The frogs may have been where they were as that could have been where the spawn was and where they developed as tadpoles. Most don't survive to adulthood, but moving them away from their own area shortens their chances.
They can 100% get out, we made sure of that before we filled the pond from our water butt. Sadly, there were several dead baby frogs in the riverbank too and these weren't exactly jumping away. Thanks for the advice 
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Yes, most tadpoles never make it the frog stage, and most baby frogs don't get beyond that, so makes sense there were dead frogs there where there were lots of others. The drought will have killed huge numbers of amphibians. There is also the risk there was disease where so many frogs congregated.
I vaguely recall reading/hearing from a reliable source, only 2% of tadpoles make it to the adult frog stage.
Nature can seem harsh, and the reason why so much frog spawn is produced is to balance out the high mortality rate, so those dead froglets will provide food for other species. Tadpoles will make a food supply for fish in water courses, ponds and lakes, along with the many larvae that will live in the water, just as larvae will make for a food supply for fish and other creatures.
While your froglets in their new found home can get in and out of the pond, they will also need to get in and out of the garden to meet up with other frogs, or there will be a risk of inbreeding.
It is a learning curve, and will be a fascinating one, and while your intentions were well meaning, ideally, it is best to leave nature to live in its own natural habitat where possible.
One final thing, water from a water butt, that can have its own problems depending on where the water is collected from. Roof's can harbour toxic chemicals to wildlife, but not humans, from the roofing material used, particularly felt roofs and older felt roofs that are close to requiring replacement.
Mike