How do I build the raft I am on day 42 as keith and I went the the lake..

Go to the beach through the forest walk towards the sea and it will do auto text saying 'I should build a raft here' then when you look at the top right of the screen after the auto text you will see build... Save before trying to build so you can have another go without loosing your logs etc

Right, getting enough log is hard. If the meter says you have enough log and rope, then seriously, it's easy from then. At the bottom of the screen is a box which says [Build X]. If you have enough log and rope the box will be yellow. This means you can build it. Press X and vwa la, you can now build the first, second, third, fourth, fifth, or sixth part of the boat. Yeah right, there is six steps into building the boat. One at a time, you must build and succeed in the current step or you'll never get to build the boat. I would advise you to save before starting. If you don't succeed then you will still have enough stuff if you save. Unfortunately, it gets very hard to find log and tree vine after the first few steps because you've used it all up. It takes quite a while to complete all the steps but eventually it will be finished and you can finally get across the river. Bring Skye with you when you've finished, she'll come in handy.