user58527: I want to make a present to my friend for his wedding - a bitcoin paper wallet.
I managed to print it and send 100uBTC (0.0001BTC) to the paper wallet for a test.
Then I chose "Sweep paper wallet" and I got a message that the coins are there, but "the amount of coins in the wallet is too small for sweeping".
What is the minimum amount that I can sweep?

user3511: Sweeping is just sending all bitcoins to another address. As such, there is a network fee involved.
Network fees will come out of the value of the paper wallet.
Depending on what you are using for sweeping, you can vary the fees. Though 
a lower fee will take longer to complete:
https://bitcoinfees.21.co/
At the risk of dating this answer, I would currently allow 0.001 BTC in your friend's gift for fees for fast transactions, about 5 USD, (yes fees are pretty high right now.) 

58527: <p>I want to make a present to my friend for his wedding - a bitcoin paper wallet.</p>

<p>I managed to print it and send 100uBTC (0.0001BTC) to the paper wallet for a test.</p>

<p>Then I chose "Sweep paper wallet" and I got a message that the coins are there, but "the amount of coins in the wallet is too small for sweeping".</p>

<p>What is the minimum amount that I can sweep?</p>
 3511: <p>Sweeping is just sending all bitcoins to another address. As such, there is a network fee involved.</p>

<p>Network fees will come out of the value of the paper wallet.</p>

<p>Depending on what you are using for sweeping, you can vary the fees. Though 
a lower fee will take longer to complete:</p>

<p><a href="https://bitcoinfees.21.co/" rel="nofollow noreferrer">https://bitcoinfees.21.co/</a></p>

<p>At the risk of dating this answer, I would currently allow 0.001 BTC in your friend's gift for fees for fast transactions, about 5 USD, (yes fees are pretty high right now.) </p>
