^ Thanks, but is there a way to not use paper wallet. Like creating online wallet, sending bitcoin to it, than take bitcoin wallet off the computer and deleting it?
You realize that a paper wallet is just a public+private key after all? It's one of the simplest and cheapest ways to "store" Bitcoin.
Of course, you can do something similar by saving Electrum's seed words.
If you use a wallet software and save the wallet file onto a stick you already risk to have the private key(s) leaked due to malware or there's a chance that the wallet program you've been using to be discontinued after some years you or your grandparents want to access the money (example of discontinued software is Multibit classic). Also this means storing on USB stick which can get broken, either because of age, either because of misuse.
Is there a way to give him like a code or memory stick....?
If you fancy the USB sticks (as I said, I don't), this could be useful for you; I've read about it not too long ago: some USB stick wallet you can load up with Bitcoin
https://opendime.com/I completely agree with everything NeuroticFish said, but only wanted to add one more thing: your idear of creating on online wallet is not good at all... The basic idear of bitcoin is being your own bank. By using an online wallet, you hand over your private keys to an online entity. It's up to this entity to manage your unspent outputs. The person (or company) can pull an exit scam, get hacked, go bancrupt,... You can also lose your credentials, and they might not be able (or willing) to help you out.
I've said it before, and i'll say it once again: "if you're not the (only) one in controll of your private keys, you're not the (only) one in controll of your funds!"
Do yourself a favour, and stay away from any kind of online wallet, especially for bigger amounts, and for long term storage... The fact they have a smaller learning curve does not compensate for the loss of security and privacy... Better pick a secure paper, hardware or airgapped wallet with a bigger learning curve but better security and privacy.
Also, you'll have to realise that an usb drive also has a certain lifespan... Albeit, the lifespan is usually linked to the number of read/write cycles, and not so much to the age of the stick... That being said: if you do chose this path, make several copies and store them in different places.